STUDY TOPIC: Maximum income, Quadratic, Linear, Constant, Rational, Potential, Logarithmic, Supply, Demand, Total income, Total Cost, Derivative of a fraction, Maximum and Minimum from the Function of Average Cost, Marginal Cost, Marginal Income , Profits per Sale, Parts of a Derivative, Derivative of a Positive or Negative Power or Exponent, Sum Differentiation Rules, Second Differentiation Rule, Chain Rule, Exchange Rate and First Derivative Criterion, Production Cost, Price of Equilibrium, Exponential Function, Solved problems of LIMITS, Review of the law of signs and various functions.